Turning moJoe into a jar of lemon-flavored pickles

After tying moJoe down (you don't think he'll agree to this, do you?), cut a pentagram into his chest with the knife. Be careful you don't injure him too badly -- if you kill him, you'll end up turning him into an astral cat-demon, and then you'll be up Shit Creek.

After you've carved the pentagram (and not before), mix the blood and the graveyarddust together and pour the mixture into the wound while chanting, "Winisiko panuu vaal Dorlog, Dorlog vaal." When you're done pouring, place the empty glass jar next to him -- no further than 12 inches away.

Then walk backwards around moJoe thirteen times chanting "Winisiki panuu dorll Dorlog, Dorlog dorll vene vaal." Finally, leave the room without looking at moJoe. Wait at least three hours -- do NOT go back any earlier. When you get back, moJoe will be gone, and the jar will be filled with lemon-flavored pickles.